Identify the states that have the highest concentration of tribal population:

Meghalaya, Mizoram, Nagaland

The correct answer is Option (3) - Meghalaya, Mizoram, Nagaland.

Share of tribals in the state population: The North Eastern states have the highest concentrations, with all states, except Assam, having concentrations of more than 30%, and some, like Arunachal Pradesh, Meghalaya, Mizoram and Nagaland with more than 60% and upto 95% of tribal population .